diff --git a/scripts/blame.py b/scripts/blame.py
index 18cdc9c1a..3557d3813 100755
--- a/scripts/blame.py
+++ b/scripts/blame.py
@@ -54,37 +54,46 @@ def get_aider_commits():
 
 
 
-def process(fnames):
-    aider_commits = get_aider_commits()
+def process_fnames(fnames, git_dname):
+    if not git_dname:
+        git_dname = "."
+
+    aider_commits = get_aider_commits(git_dname)
     total_lines = 0
     total_aider_lines = 0
 
     for fname in fnames:
-        num_lines, num_aider_lines = get_lines_with_commit_hash(fname, aider_commits)
+        num_lines, num_aider_lines = get_lines_with_commit_hash(fname, aider_commits, git_dname)
         total_lines += num_lines
         total_aider_lines += num_aider_lines
         percent_modified = (num_aider_lines / num_lines) * 100 if num_lines > 0 else 0
-        print(f"{fname}: {num_aider_lines}/{num_lines} lines modified by aider ({percent_modified:.2f}%)")
+        if not num_aider_lines:
+            continue
+        print(f"{fname}: {num_aider_lines}/{num_lines} ({percent_modified:.2f}%)")
 
     total_percent_modified = (total_aider_lines / total_lines) * 100 if total_lines > 0 else 0
-    print(f"Total: {total_aider_lines}/{total_lines} lines modified by aider ({total_percent_modified:.2f}%)")
+    print(f"Total: {total_aider_lines}/{total_lines} lines by aider ({total_percent_modified:.2f}%)")
+    return total_percent_modified
+
+def process_repo(git_dname=None):
+    if not git_dname:
+        git_dname = "."
+    result = subprocess.run(
+        ["git", "-C", git_dname, "ls-files"],
+        capture_output=True,
+        text=True,
+        check=True
+    )
+    fnames = [fname for fname in result.stdout.splitlines() if fname.endswith('.py')]
+    process_fnames(fnames, git_dname)
 
 def main():
     if len(sys.argv) < 2:
-        result = subprocess.run(
-            ["git", "ls-files"],
-            capture_output=True,
-            text=True,
-            check=True
-        )
-        fnames = [fname for fname in result.stdout.splitlines() if fname.endswith('.py')]
-        if not fnames:
-            print("No Python files found in the repository.")
-            sys.exit(1)
+        process_repo()
     else:
         fnames = sys.argv[1:]
 
-    process(sys.argv[1:])
+    process_fnames(fnames)
 
 
 if __name__ == "__main__":